/* 
#include<stdio.h>
int f(int n)
{
	int i;
	if(n>0)
		n=n+10;
	else
		if(n<0)
			n=n+20;
		else
			n=100;
		printf("n=%d\n",n);
}
main()
{
	int n;
	printf("input number\n");
	scanf("%d",&n);
	f(n);
}
*/
